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Page 23 of 38 <br /> alscience <br /> V"-----• <br /> nvironmental Quality Control - LCS/LCS Duplicate F <br /> A abora <br /> � tones, Inc.lnc. e <br /> Cardno ERI Date Received: N/A <br /> 601 North McDowell Blvd. Work Order No: 11-12-0206 <br /> Petaluma, CA 94954-2312 Preparation: EPA 3010A Total <br /> Method: EPA 6010B <br /> Project: ExxonMobil99CAS/022789C <br /> Date SD <br /> Quality Control Sample ID Matrix Instrument Prepared A alar ed LCS NumbeBatch <br /> 097-01-003-12,194 Aqueous ICP 5300 12/06/11 12/07/11 111206LA3 <br /> Parameter SPIKE ADDED LCS%REC LCSD%REC %REC CL RPD RPD CL Qualifiers <br /> Arsenic 0.5000 100 98 80-120 2 0-20 <br /> Cadmium 0.5000 105 102 80-120 2 0-20 <br /> Lead 0.5000 107 105 80-120 2 0-20 <br /> Selenium 0.51.000 97 95 80-120 2 0-20 <br /> RPD-Relative Percent Difference, CL-Control Lirnil <br /> 4 <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 - TEL:(714)895-5494 . FAX: (714)894-7501 <br />